Functions In Objects - JsPlayground 2022

In JavaScript you can define functions as object methods. The following example creates an object (Person), with two properties (firstName and lastName), and a method (fullName):


function Person(firstName, lastName)
{
    this.FirstName = firstName;
    this.LastName = lastName;
    this.FullName = function () { return this.FirstName + " " + this.LastName; }
}

let demo1 = document.getElementById("demo1");
let person1 = new Person("Ricky", "Bobby");
demo1.innerHTML = person1.FullName();